Saturday evening the 6th and Sunday the 7th of April noticed at least two more pairs of adults had arrived at other nests in Cove Point Park,not sure if the two other nests are occupied yet.Last year there were five occupied nests in the park,four of them within a couple hundred yards of each other that can all be seen from a certain vantage point.One is in a different part of the park not visible with the others,have not seen any activity at that nest yet.Have seen birds at three nests so far this past weekend.Will try to get good pictures soon.